User Guide

Frequently Asked Questions
B-16
Q: Does AOpen mainboard support Fan/Voltage/Thermal monitoring and
protection?
A: Yes, please check following table.
Features AP5T-3 AX6F-1 AX5T-3 AX5T-3.1
Synchronous Switching
Regulator
Yes Yes Yes Yes
3.3V and CPU Vcore
Over-current protection
Yes No Yes Yes
CPU Thermal Protection Yes Yes Yes Yes
CPU Fan Monitoring No No No Yes
System Voltage
Monitoring
No No Yes Yes
Q: What is the difference between AX5T-1, AX5T-2 and AX5T-3?
A: AX5T-2 fixes the ATX power supply to off state when you first time install your
AX5T mainboard. AX5T-3 Implements switching regulator and many other
features.
Note that they all have 75MHz and AX5T-3 has 83.3MHz jumper setting. The
user set clock to 75MHz/83.3MHz is taking his own risk, and is probably to have
system unstable behavior.
Item AX5T-3.1 AX5T-3 AX5T-2 AX5T-1
75MHz jumper setting Yes Yes Yes Yes
83.3MHz jumper setting Yes Yes No No
ATX Power Supply initial
state
Off Off Off Random
Onboard Power Regulator Synchronous
Switching
Synchronous
Switching
Linear Linear
3.3V and CPU Vcore
Over-current protection
Yes Yes No No
CPU Thermal Protection Yes Yes No No
CPU Fan monitoring Yes No No No
System Voltage
Monitoring
Yes Yes No No